A/C System Performance

Park vehicle out of direct sunlight. Open engine hood. Open front doors. Connect A/C pressure gauges to pressure ports. Measure relative humidity. Measure ambient air temperature.
Move temperature control lever to coldest setting. Select vent mode. Select recirculated air. Insert a thermometer in center vent outlet. Turn A/C switch on, and set blower switch to highest speed. Run engine at 1500 RPM. Ensure no one is inside vehicle.
After running A/C for 10 minutes, check temperature at center vent outlet. Check system pressures. If temperature and pressures match A/C system performance test chart, system is operating within range. See Fig 1 , Fig 2 , Fig 3 or Fig 4 .

Fig 1: 2.3CL A/C System Performance Test Chart (Degrees F & psi)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 2: 2.3CL A/C System Performance Test Chart (Degrees C & kg/cm2)

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Fig 3: 3.0CL A/C System Performance Test Chart (Degrees F & psi)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Fig 4: 3.0CL A/C System Performance Test Chart (Degrees C & kg/cm2)

Courtesy of AMERICAN HONDA MOTOR CO., INC.